twisted.internet.process.ProcessReader(abstract.FileDescriptor) class documentation

Part of twisted.internet.process View Source (View In Hierarchy)

ProcessReader

I am a selectable representation of a process's output pipe, such as stdout and stderr.

Method __init__ Initialize, specifying a process to connect to.
Method fileno Return the fileno() of my process's stderr.
Method writeSomeData Write as much as possible of the given data, immediately.
Method doRead This is called when the pipe becomes readable.
Method dataReceived Undocumented
Method loseConnection Close the connection at the next available opportunity.
Method connectionLost Close my end of the pipe, signal the Process (which signals the ProcessProtocol).

Inherited from FileDescriptor:

Method doWrite Called when data can be written.
Method writeConnectionLost Indicates write connection was lost.
Method readConnectionLost Indicates read connection was lost.
Method write Reliably write some data.
Method writeSequence Reliably write a sequence of data.
Method loseWriteConnection Undocumented
Method stopReading Stop waiting for read availability.
Method stopWriting Stop waiting for write availability.
Method startReading Start waiting for read availability.
Method startWriting Start waiting for write availability.
Method stopConsuming Stop consuming data.
Method resumeProducing Resume producing data.
Method pauseProducing Pause producing data.
Method stopProducing Stop producing data.
Method _postLoseConnection Called after a loseConnection(), when all data has been written.
Method _closeWriteConnection Undocumented
Method _isSendBufferFull Determine whether the user-space send buffer for this transport is full or not.
Method _maybePauseProducer Possibly pause a producer, if there is one and the send buffer is full.

Inherited from _ConsumerMixin (via FileDescriptor):

Instance Variable producer None if no producer is registered, otherwise the registered producer.
Instance Variable producerPaused A flag indicating whether the producer is currently paused. (type: bool)
Instance Variable streamingProducer 0 A flag indicating whether the producer was registered as a streaming (ie push) producer or not (ie a pull producer). This will determine whether the consumer may ever need to pause and resume it, or if it can merely call resumeProducing on it when buffer space is available.
Instance Variable streamingProducer bool or int
Method registerProducer Register to receive data from a producer.
Method unregisterProducer Stop consuming data from a producer, without disconnecting.

Inherited from _LogOwner (via FileDescriptor):

Method logPrefix Override this method to insert custom logging behavior. Its return value will be inserted in front of every line. It may be called more times than the number of output lines.
Method _getLogPrefix Determine the log prefix to use for messages related to applicationObject, which may or may not be an interfaces.ILoggingContext provider.
def __init__(self, reactor, proc, name, fileno): (source)
overrides twisted.internet.abstract.FileDescriptor.__init__

Initialize, specifying a process to connect to.

def fileno(self): (source)
from twisted.internet.interfaces.IFileDescriptor
overrides twisted.internet.abstract.FileDescriptor.fileno

Return the fileno() of my process's stderr.

def writeSomeData(self, data): (source)
overrides twisted.internet.abstract.FileDescriptor.writeSomeData

Write as much as possible of the given data, immediately.

This is called to invoke the lower-level writing functionality, such as a socket's send() method, or a file's write(); this method returns an integer or an exception. If an integer, it is the number of bytes written (possibly zero); if an exception, it indicates the connection was lost.

def doRead(self): (source)
from twisted.internet.interfaces.IReadDescriptor
overrides twisted.internet.abstract.FileDescriptor.doRead

This is called when the pipe becomes readable.

def dataReceived(self, data): (source)
Undocumented
def loseConnection(self): (source)
from twisted.internet.interfaces.ITransport
overrides twisted.internet.abstract.FileDescriptor.loseConnection

Close the connection at the next available opportunity.

Call this to cause this FileDescriptor to lose its connection. It will first write any data that it has buffered.

If there is data buffered yet to be written, this method will cause the transport to lose its connection as soon as it's done flushing its write buffer. If you have a producer registered, the connection won't be closed until the producer is finished. Therefore, make sure you unregister your producer when it's finished, or the connection will never close.

def connectionLost(self, reason): (source)
from twisted.internet.interfaces.IFileDescriptor
overrides twisted.internet.abstract.FileDescriptor.connectionLost

Close my end of the pipe, signal the Process (which signals the ProcessProtocol).

API Documentation for Twisted, generated by pydoctor at 2018-07-14 04:53:34.